I don't want my email user to have a carbon copy to their personal gmail account. Its a matter of company policy. I use round cube as their web-mail and don't want them to have a copy of our company emails when they wanted to resign.

Staff Member

Gmail is essentially acting as the email client in this scenario (it's using POP3/IMAP and SMTP). The email user could do the same thing with any other email client (e.g. Outlook, Thunderbird). The easiest way I can think of to prevent this from working would be to setup a firewall rule that blocks access to the IMAP and POP3 ports from Google's IP ranges. CSF is a useful plugin for managing firewall rules should you want to do that: